Packing and method of making the same



PACKING AND METHOD OF MAKING THE SAME Filed March 18, 1924 Patented Dec. 18, 1928.'

PATENT OFFICE.

CLEMENT BESTEIN, O HATBORO, PENNSYLVANIA.

i PAcxINGnND METHOD Application led March 18,

A' packing consisting of a cork stripr and a flexible .channeled ,strip hugging the cork strip on three sides is possessed of great durability, efliciency and other desirable qualities. However, to commercially obtain such a packing in the curved form. required by conditions of use presents' diiliculties of which the following may be mentioned: L

A straight strip of cork when dry is so brittle that it cannot belbrought into curved form without undue fracture or rupture, and if wet or steamed, in order to bend it, it is not accurate in crosssectional size when thereafter dry, and this is true even when a strip of cork is arranged in the channel of a channeled strip.

The principal object of the present invention is to provide for the commercial and satisfactory production ofk packing of the kind referred to and which consists of a cork strip and a flexible channeled strip hugging the cork strip on three sides, and to that and other ends hereinafter set forth the means embodying the invention comprise a lineof stitching extending through both strips whereby curved form can be imparted to the cork strip even in dry condition and a vul canizable compound or component in the channeled strip whereby the channeled strip can be set or vulcanized in curved form to e packlng consisting of a cork strip anda flexhold the cork strip in the curved form imv parted to it. v V

The invention also comprises the-improvements to be presently described and finally claimed and in the description reference will be made to th'e accompanyin drawings forming part hereofand 1n whc Figure 1 is a View of .a strip ofcork.

Fig. 2 is a viewlshowing a line of stitchmg extending t ough both the cork'strip and-a channeled st ip of vulcanizable fabric as duck or asbestos and rubber.

Fig. 3 is a'transverse sectional view taken on the line 3 3 of Fig. 2 drawn to an enlar ed scale, and c 'g. 4 is a view of the finished packing 1n-v curvedor spiral form,v p

In the drawings le's a straeiht etti ofA cork. 2 is a flexible channel strip ug-A gng the cork strip on threesitles.l Thelstrip 2 consists of fabric. According to my 1n- OF MAKING THE SAME.

y1924. Serial No. 700,182.

neled strip contains a vulcanizable component, as rubber, and also a suitable fabric, as

lasbestos or layers of duck.

The line of stitching 3 in the final product performsthe function of holding the walls of the channeled strip 2 in substantial parallelism against the 'force exerted by the reciprocatingf rod. p

The bending force applied to bringit from the straight form shown in Fig. 2, as around a mandrel, to curved vform 1s distributed throughout the cork strip by reinforcing it with the channeled strip of flexible vulcanizable material stitched canization of the bent flexible channeled strip preserves the curved form of strip.

It will be obvious to those skilled lin the art that modifications may be made in deL tails ofconstruction,l arrangement, procedure and matters of mere form without depart1 ing from the spirit of the invention which is the cork thereto, and then vul y not limited as to such matters or otherwise I than as the prior art and the appended claims may require.

I claim: e

1. Means for imparting curved form to a ible channeled strip hugging the cork stripon three sides which comprise a line'of stitching extending through both the cork strip and the confronting walls of the channeled strip whereby circular form can be impartedl ring form the improvement which consists l in distributinthe bending force throughout i the corkfstrip y stitching itto the confront- .ing walls and reinforcing itwith 'a chan- `neled strip of iexible vulcanizable material,`

flexible strip to prey sind vulcanizin the bent serve the ring orm of the cork's'trip.'

CLEMENT RESTEIN. 

